Fibrous connective tissue packed with masses of fat cells (adipocytes). In human adults it consists mostly of white fat. It forms a thick layer under the skin and occurs around the kidneys and in the buttocks. It serves both as an insulating layer and an energy food store; food in excess of requirements is converted into fats and stored within these cells.

Unit 2,

Reference: Oxford Concise Colour Medical Dictionary (7th Edition, Kindle Edition) Oxford University Press 2020 ISBN-13: 978-0198836629, p899